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night vision

Did You Know? Light and night vision

As the sun sets and it dawns, we humans perceive it becomes dark with no natural light. At best, we use other light sources to illuminate our surroundings for continuing our activities at night. This is because as humans, we can perceive light only in a particular spectrum of the electromagnetic radiation, which is called as visible light. Technically, light is any radiation across various wavelengths in the electromagnetic spectrum. And a portion of it, having a wavelength within 400-700 nanometres, falls under the category, which is what our eyes have evolved to perceive (sense).

12 August 2021, 09:29 IST

Light and night vision

Light and night vision

Did You Know? Light and night vision

12 August 2021, 09:29 IST